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Use the t-distribution table to find the critical values for the indicated alternative hypothesis, level of significance, a and sample size n1 and n2. Assume that the sample are independent, normal and random. Ha: u1 < u2, a = 0.25, n1 = 9, n2 =6.
a) Find the critical values assuming that the population variance are equal.
b) Find the critical values assuming that the population variance are not equal.
CPI and Subway Fare Find the best predicted cost of subway fare when the consumer Price Index (CPI) is 182.5 (in the year 2000).
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
What should the cut-off score be for the interviews? (Round to nearest whole number).
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
A sample of 10 observations is selected from a normal population for which the population standard deviation is known to be 4. The sample mean is 23. (Round your answers to 3 decimal places.) (a) The standard error of the mean is_____?
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
What kind of probability uses sample spaces to find out numerical probability that event will happen?
For all questions, clearly explain/show your answers. For the Analysis section, justify your answers with the appropriate graphs, statistics, equations, etc.
Give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected
Develop percent frequency distribution and construct bar chart and pie chart.
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
Select either the Least Squares Method, the Moving Average Method, or the Weighted Moving Average and provide step-by-step instructions you would employ to plot the associated trend line.
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